I used to use the NuNaturals stevia powder. But with the last jar I ordered at least 1/3 of it started clumping and I could barely use it. This never happened with my previous order so I was very dissapointed.
So I wanted to try the tablet form and ordered Now Foods Instant Tabs. Great product! Easy to use, no measuring out. Just drop 'em in your beverage or whatever and your good to go.